Unseasonably cold air swept into Alaska’s largest city Thursday, and forecasters expect it to stay through the weekend. The cold is plunging south into Alaska all the way from the North Pole, pushing a band of snow through Southcentral.

The 2021 season in the city of Kyoto peaked on 26 March, according to data collected by Osaka University. The city has experienced an unusually warm spring this year. Increasingly early flowerings in recent decades are likely to be as a result of climate change.

Early budding willows (genus Salix) were observed on the Chistochina Trail during temperatures of 18 above Fahrenheit. The average temperature on March 23, 2021 was 10 degrees Fahrenheit, the coldest temperature on the day in the past twenty years.

Some migrant birds are already flocking to the north, but a cold snap may delay more returns.

In Alaska, pasque flowers are known to bloom in May, but increasingly warm temperatures may create conditions that lead to earlier bloom times.

Mother's Day will bring Arctic blasts, wintry conditions and records low temperatures for two-thirds of the US.

The first two arctic terns of the season were spotted in Southeast Iceland on Saturday morning, according to the Southeast Iceland Bird Observatory. Their arrival is two or three days earlier than usual. Bird enthusiasts across the country are following along with migratory species as they return to their breeding grounds in Iceland.

"It is unusual for bears with youngsters to wake up so early and it is difficult to say why these have come out. The bears may have been disturbed by humans or other animals."

There are currently fewer minke whales and more humpbacks in Icelandic waters than usual for the time of year, and some appear to be skipping the southward migration altogether.

Willows are budding early, following temperature swings of 40 to approximately -32 degrees Fahrenheit between February and March.

For those who suffer from seasonal allergies, spring means red eyes, mucus and fits of sneezing. This year, the Lynn Canal has seen a remarkable spruce pollen bloom.

The Cowichan River is lower than it was in August last year, after the long extreme heat and drought. There might not be enough water in the river for newly-hatched salmon to swim to the ocean.

Kettle ponds in Denali National Park contain less water this spring than in previous years, due to low snowfall and permafrost thaw. Shrubs are replacing grasses as the lakes dry.

The cold and wet hunters built a fire to keep warm until Alaska Army National Guard rescuers arrived hours later.

Seasonal swings set drivers up for bad trip.

I rarely see trumpeter swans on the lake, and I don't ever remember seeing them so early.

The sun when direct was intense, definitely not April and not May...more like the month of June.

In the earliest breakup since the contest began in 1917, the Nenana Ice Classic Tripod fell early this morning.